Hi,
> 1) is the client under your control ? Ie, can you make so that the
client does not send any message until teh handshake has completed ?
Actually the client is more the server part, i open the connection,
the "client" then send a string with the supported protocol
variants like this (end by \n):
VARIANt1;VARIANT2;VARIANt3
Next is send the desired variant and get the version like this:
1.2;1.3;2.2
As the last part i send back the desired version which gets acknowledge
be the client.
That is the handshake, now the client or i can send messages, before
this moment no other messages are exchanged. So yes i client is more or
less under control.
2) In case you can't control the client, what I understand is that you
differ the decoding of the received message until the handshake is
completed. Am I right ?
Yes your are good. After the handshake a slightly modified xml messages
are exchanged. I use a ProtocolCodecFilter for that.
regards
Max
Le 3/27/14 8:31 PM, Max Larsson a écrit :
Hi,
i have a question regarding who to implement it in a nice way.
Background:
The protocol i implements has upon a connection establishment a
small handshake. Mainly to choose which version and variant of
the protocol to use.
For the handshake i implemented a StateMachine, which upon a
session create event start the handshake. Thats works fine.
Now if i use the higher level implementation i have a method
connect which tells mina to use my iohandler etc and try to build
a connection. Next i send some protocol messages. Now i have the
problem that the handshake needs some time and between connect
and sending a message the state machine hasn't yet gone through
the handshake and thus don't forward the message top the socket,
as long it isn't in the matching state.
To avoid that i do the following in the connect method:
- connect
- wait for sessionCraeted event // now the StateMachine performs the
hadnshake
- i sleep for about 2 seconds
And for that last step i have a feeling there must be a better way
to implement that?
best regards
Max Larsson
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